But homes are already becoming increasingly unaffordable, and refinancings are slowing down.

I did some work with a large private sector company who had the same dilemma i.e. the final salary pension scheme was becoming unaffordable.

Then the system fought this corruption and the "market" collapsed, becoming unaffordable for the poor.

Working Tax Credits have been frozen and childcare is becoming unaffordable.

At the same time, for most American families, college is becoming increasingly unaffordable.

The rising costs of medical services, technology, and medication are becoming unaffordable for many patients preventing these individuals from receiving adequate healthcare.

This may not prevent the cost of conventional meat from becoming completely unaffordable to the masses by 2050.

Major programs of human space flight are becoming unaffordable, except through multinational collaborations.

Birth rates may rise as well, for contraception is becoming unaffordable for some families.

However I don't think you can simply point at these as a reason not to deal with public service pensions which have become unaffordable.